十万个为什么·科学启蒙30篇（1）
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Why Do We Get Hiccups?
我们为什么会打嗝？
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Hiccups happen when your diaphragm—the main breathing muscle—spasms suddenly.
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Each spasm pulls air quickly into your throat, making your vocal cords snap shut.
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That sharp closure creates the classic 'hic' sound we all recognize.
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Common triggers include eating too fast, drinking carbonated drinks, or feeling nervous.
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Sometimes hiccups follow sudden temperature changes or excitement in children.
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Most hiccups last only a few minutes and stop without treatment.
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Doctors think hiccups may help babies burp up air while feeding in the womb.
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Long-lasting hiccups (over 48 hours) are rare but need medical check-ups.
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Breathing into a paper bag or holding your breath can reset your breathing rhythm.
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Scientists continue studying hiccup nerves to understand brain-body communication better.